EP 1345321 A1 20030917 - A circuit comprising amplifiers connected in parallel, and a method of reducing the difference in amplitude between output signals from amplifiers thereof
Title (en)
A circuit comprising amplifiers connected in parallel, and a method of reducing the difference in amplitude between output signals from amplifiers thereof
Title (de)
Schaltung mit in parallel geschalteten Verstärkern, und Verfahren zur Reduzierung der Amplitudenabweichung zwischen Ausgangssignalen dieser Verstärker
Title (fr)
Un circuit comportant des amplificateurs en paralèlle, et procédé de réduction de la différence de l'amplitude entre les signaux de sortie de ces amplificateurs
Publication
Application
Priority
EP 02251799 A 20020313
Abstract (en)
A circuit is provided comprising at least two amplifiers (20,22,120,122,220,222,320,322) electrically connected in parallel. The circuit includes a controller (38,138,238,338) operative to reduce the difference in amplitude between output signals from the amplifiers. The controller (38,138,238,338) is operative to determine or receive an indicator of the difference in amplitude between the output signal (A) of a first amplifier (20,120,220,320) and the output signal (B) of a second amplifier (22,122,222,322), and to adjust the gain of at least one of the first and second amplifiers dependent upon the indicator. <IMAGE>
IPC 1-7
IPC 8 full level
H03F 1/32 (2006.01); H03F 3/21 (2006.01); H03F 3/60 (2006.01)
CPC (source: EP US)
H03F 1/3288 (2013.01 - EP US); H03F 3/211 (2013.01 - EP US); H03F 3/602 (2013.01 - EP US)
Citation (search report)
- [XAY] WO 0106643 A1 20010125 - QUALCOMM INC [US]
- [YA] US 5222246 A 19930622 - WOLKSTEIN HERBERT J [US]
- [X] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 24 11 May 2001 (2001-05-11) & US 6634680 A
- [A] "A 50 W, SOLID-STATE C-BAND AMPLIFIER FOR OUTDOOR USE", MICROWAVE JOURNAL, HORIZON HOUSE. DEDHAM, US, vol. 41, no. 4, April 1998 (1998-04-01), pages 110,112,114, XP000833656, ISSN: 0192-6225
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 02251799 A 20020313; US 37901903 A 20030304